package com.immortal.core.autoconfigure;

import com.immortal.core.configure.TaskThreadPoolConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.aop.interceptor.AsyncUncaughtExceptionHandler;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
import org.springframework.scheduling.annotation.AsyncConfigurer;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.lang.reflect.Method;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;

/**
 * 原生(Spring)异步任务线程池装配类
 */
@Slf4j
@Configuration
public class NativeAsyncTaskConfiguration implements AsyncConfigurer {


    //注入配置类
    @Autowired
    private TaskThreadPoolConfig taskThreadPoolConfig;

    @Override
    public Executor getAsyncExecutor() {
        return executor();
    }

    @Bean
    @Primary
    public Executor executor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //核心线程池大小
        executor.setCorePoolSize(taskThreadPoolConfig.getCorePoolSize());
        //最大线程数
        executor.setMaxPoolSize(taskThreadPoolConfig.getMaxPoolSize());
        //队列容量
        executor.setQueueCapacity(taskThreadPoolConfig.getQueueCapacity());
        //活跃时间
        executor.setKeepAliveSeconds(taskThreadPoolConfig.getKeepAliveSeconds());
        //线程名字前缀
        executor.setThreadNamePrefix("MyExecutor-");

        // setRejectedExecutionHandler：当pool已经达到max size的时候，如何处理新任务
        // CallerRunsPolicy：不在新线程中执行任务，而是由调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        executor.initialize();
        return executor;
    }

    /**
     * 异步任务中异常处理
     *
     * @return
     */
    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return new AsyncUncaughtExceptionHandler() {
            @Override
            public void handleUncaughtException(Throwable arg0, Method arg1, Object... arg2) {
                log.error("==========================" + arg0.getMessage() + "=======================", arg0);
                log.error("exception method:" + arg1.getName());
            }
        };
    }
}
